1、1三种时态的比较学习三种时态的比较学习新目标七年级新目标七年级2在英语中，用动词的形式的变化来在英语中，用动词的形式的变化来表达表达不同时间不同时间发生的动作或存在的状态发生的动作或存在的状态，这就是时态。现在进行时一般现在时一般过去时3现在进行时：一般现在时：一般过去时：现在或现阶段正在进行的动作。经常、反复或习惯性的动作以及存在的状态。过去某个时间发生的动作或存在的状态。概念4现在分词的构成：动词第三人称单数的构成：过去式的构成：直接加ing.重读辅元辅，双写尾字母加ing.以e 结尾去e加ing.直接加s.以s,x,ch,sh,o结尾加es.以“辅音+y“结尾变y 为i再加es.直接加e
2、d.以e结尾只加d.重读辅元辅,双写尾字母再加ed.以辅音+y结尾变y 为i 再加ed.谓语动词形式5have-look-begin-use-shop-get-dance-study-现在分词（一般现在时）第三人称单数过去式study-finish-have-go-do-play-watch-give-need-stop-hope-play-try-plan-visit-like-having lookingbegin ningusing shop ping get tingdanc ingstudy ing stud iesfinishes has goesdoesplay s watch
3、esgivesneed edstop pedhope d play edtried plan ned visitedliked（现在进行时）（一般过去时）动词形式的变化动词形式的变化6标志词现在进行时now,Look!Listen!at this time Where is?Its 8:00 am.7标志词一般现在时always,usually,often,sometimes,every day,three times a day等表达频度的副词常在一般现在时态中使用。8标志词一般过去时last night，two days ago，in 1999（过去的年份），yesterday，just
4、now=a moment ago刚才，the day before yesterday 9判断下列时间状语属于哪种时态判断下列时间状语属于哪种时态last night now every day Look!yesterdayoftenListen!two years ago alwaysin 1897three times a week一般现在时一般过去时现在进行时10变否定句的方法：首先看有无be动词，如果有，在be动词后面加not.如：Heis a teacher.Heisnta teacher.主语+dont/doesnt/didnt+动词原形如：Shewent to Paris yes
5、terday.She didntgoto Paris yesterday如果没有be 动词，看原句的动词形式来决定借用助动词do/does/did,并在后面加not,并且动词要还原。11变一般疑问句的方法：首先看有无be动词，如果有，将be提到句首并大写，句末打问号.如：Heis a teacher.Is he a teacher？如果没有be动词，看原句的动词形式来决定借用助动词do/does/did,并且动词要还原。动词-原形动词-s/es动词-ed+动词原形?DoDoesDid如：She went to Paris.Didshe goto Paris？对比时态动词形式否定句一般问句现在进
6、行时一般现在时一般过去时三种句式的对比三种句式的对比be+动词-ing(现在分词）在be 后加上not Be提到句首动词-原形动词-第三人单数在行为动词前借用do,does后加not，行为动词还原Do,Does 提到句首，行为动词还原动词-ed(过去式）在行为动词前借用did后加not，行为动词还原Did 提到句首，行为动词还原13判断时态形式判断时态形式：1.He always likes playing the piano.()2.We are having an English classes now.()3.They often go home late.()4.Lucy danced
7、 the disco at the party last night.()5.I liked go to the zoo when I was young.()6.My teacher is friendly to us.()7.Look!They are playing football.()8.She was born in 1990.()9.I lost much money last night.（）A.现在进行时B.一般现在时C.一般过去时ABCABBCCC141.He is a teacher.2.Kangkang comes from China.3.I usually take
8、 the bus to work.4.They are having classes.5.Jane played the guitar last night.Is he a teacher?He isnta teacher.DoesKangkang comefrom China?Kangkang doesnt come from China.Doyou usually takethe bus to work?I dontusually takethe bus to work.Arethey having classes?They arenthaving classes.DidJane play
9、the guitar last night?Jane didnt play the guitar last night.先先变变一一般般疑疑问问句句再再变变否否定定句句15用所给动词的适当形式填空。用所给动词的适当形式填空。1.Listen!She _ (sing)now.2.The man _(run)along the street now.3.My mother _(watch)TV play every day.4.Old Bush _(visit)China again last month.is singingis runningwatchesvisited16中考链接中考链接1.
10、-What do you do?-Im an engineer.I_in a companyin Wuhan.A.work B.had worked C.will work D.worked2.-Alice,turn down the TV,please.I_ on the phone.-Oh,Im sorry.A.have talked B.talkedC.am talking D.talk17中考链接中考链接3.Karin found some waste paper on the floor.She _ it _ and threw it into the dustbin.A.put;u
11、p B.picked;upC.turned;up D.looked;up4.Today is Fathers Day.My mother _ a special dinner for my grandpa now.A.prepare B.preparedC.is preparing D.will prepred 18中考链接中考链接5.-_ the girls _you a warm welcome?-Yes,they did.A.Did;give B.Do;giveC.Did;gave D.Does;give 6.I usually _ school at 7:30 in the morning and _ home at 5:30 in the afternoon.A.get;get B.get to;get toC.get;get to D.get to;get19
